亚硝酸对微囊藻毒素-LR的降解动力学  

The Kinetic Study of Microcystin-LR Degradation Induced by Nitrous Acid

作　　者：马庆伟[1] 黄洪辉[2] 任晶[1] 王祥荣[1] 樊正球[1] 

机构地区：[1]复旦大学环境科学与工程系,上海200433 [2]中国水产科学研究院南海水产研究所,广州510300

出　　处：《复旦学报（自然科学版）》2011年第2期213-219,共7页Journal of Fudan University：Natural Science

基　　金：农业部渔业生态环境重点开放实验室开放基金资助项目;复旦-汾湖科技产业化基金资助项目

摘　　要：首次观测到亚硝酸(HNO2)对微囊藻毒素-LR(MC-LR)具有降解作用.研究结果表明:在NaNO2存在且溶液为酸性条件下MC-LR被显著降解,而在中性或碱性条件下,MC-LR无显著降解.降解速率随溶液pH值的降低而增加,但与NaNO2浓度无线性相关.在pH为1.73,NaNO2浓度为5 mmol/L,MC-LR浓度为9.78 mg/L时MC-LR的降解速率达到最大值,在该条件下,MC-LR在5 h内降解率可达94.89%.For the first time,the degradation of MC-LR by nitrous acid was studied.Degradation of MC-LR was obvious in the present of sodium nitrite under acidic conditions and no degradation was observed under neutral and alkaline conditions or in the absence of sodium nitrite.The degradation rate increased when the pH value decreased,but did not change positively with the NaNO2 concentration.Results showed that 94.89%of MC-LR was removed within 5h under optimum initial condition of 5mmol/L sodium nitrite,pH 1.73,and 9.78mg/L MC-LR.

关 键 词：微囊藻毒素-LR 亚硝酸 高效液相色谱 降解动力学 

分 类 号：X131.2[环境科学与工程—环境科学]